What can I really say about this card? It's Llanowar Elves with a vengeance! Threshold is one of my favourite mechanics because it essentially evolves your creature and spells in the late game (Level up is a failed example of WotC trying to recapture that glory). Sure, this costs one more than Llanowar Elves, but it has the potential to be a 4/4 for 2! There's not much else I need to say about it other than that.
Pros: Potential 4/4 for 2, taps for mana, flavour text
Cons: Costs 2 for a 1/1
"Barry could barely bare to bury the barium that bared burying barely beside barren burial grounds bearing Barry's bear-born brethren."